-algebras without idempotents |
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Authors: | Joel M Cohen |
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Institution: | University of Maryland, Department of Mathematics, College Park, Maryland, 20742, USA |
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Abstract: | The simplest statement of the main results are these: Let π be a free group on 2 generators. Let Cπ be the complex ring and L1π the ring extension to L1 sums. Then L1π contains no idempotents. Furthermore, if α ? Cπ, β?L1π are nonzero, then αβ ≠ 0. The first result is in the direction of proving that a certain simple has no idempotents yielding a counter-example to the suggestion that simple are generated by their projections. |
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